Question 1094039
<br>If you want to learn a faster way to solve mixture problems, look at this method for solving your problem.<br>
(1) The mixture is 70%; the ingredients are 80% and 30%.
(2) The 70% is 4 times as close to the 80% as it is to the 30%:
{{{80-70 = 10}}}; {{{70-30=40}}}; {{{40= 4*10}}}
(3) Since the mixture percentage is 4 times as close to 80 as it is to 30, the amount of the 80% ingredient must be 4 times the amount of the 30% ingredient.<br>
That's it.  There are 60 gallons of the 30% antifreeze, so the number of gallons of 80% antifreeze must be 4*60 = 240.